Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5443322 | Flow control for writing or drawing instrument | Steffen Wunsche | 1995-08-22 |
| 5336007 | Plotter pen with indicator circuit | — | 1994-08-09 |
| 5211495 | Tubular writing instrument with suction vent | Steffen Wunsche, Ronald Broers, Thomas Hentze, Horst Eising | 1993-05-18 |
| 5052841 | Stylo pen tip | Steffen Wunsche | 1991-10-01 |
| 4863168 | Spacers for use as string protectors for tennis, squach and badminton rackets, and device for inserting these parts | Gerold Anderka | 1989-09-05 |
| D283907 | Circular spacer inserter for stringed rackets | Gerold Anderka | 1986-05-20 |
| 4188634 | Method for regulating ink flow in drafting pens | Gerold Anderka | 1980-02-12 |